After the shooting in 2015, King sponsored "Kate's Law," which would enhance penalties for convicted and deported criminals who re-enter the U.S. illegally.

The legislation, which was named in honor of Steinle, passed the House in 2016, but stalled in the Senate. Some lawmakers are now calling for it to be revived after Thursday's verdict.

King pointed out that Zarate admitted to firing the shot that killed Steinle, but his lawyers maintained the shooting was accidental.

"They don't want to find him guilty of first- or second- degree murder or negligent homicide, and they found him guilty of a gun charge," King said. "They're anti-gun, but they're not anti-murder in San Francisco is what it looks to me like."

He said it's beyond a reasonable doubt that Zarate was responsible for Steinle's death, yet he’s been given “amnesty” by a jury in a sanctuary city.

A Florida school shooting victim’s father thanked the White House on Wednesday for holding a listening session with victims and their families, adding that he pledged to find a solution to school shootings.